Doing anything at 1:30 PM EST today? OK, doing anything important? No? OK, then come here to see the 2011 Shelby GT500 unveiled online ahead of the in-real-life unveil at this week's Chicago Auto Show. But what should we expect?

All we know is the big ol' iron block is expected to be replaced with an all-aluminum engine block for reduced weight plus a few additional horses.

Additionally, the new Shelby also will get Ford's electronic power-assist steering system, high-intensity headlamps and a few other minor improvements. Other new options for 2011 include a glass roof for the GT500 coupe and two new colors: Race Red and Ingot Silver Metallic.

We're also hearing a new SVT package (SVT Cobra? Yeah, sorry, probably not) will include — according to a Ford order book by way of the Detroit News — a new version of the limited-slip rear axle, 19-inch front and 20-inch rear painted forged aluminum wheels, as well as upgraded front and rear springs and rear shocks.

The SVT package also will include a special gear shift knob, a different paint scheme with unique striping.